Icom IC-446S Émetteur-récepteur
Fabricant:
Modèle:
IC-446S
Date:
1999
Catégorie:
Groupe:
Description:
FM TRANSCEIVER

Information

Ô GENERAL Number of channels : 8 ch Type of emission : 8K50F3E Frequency stability : ±2.5 kHz Frequency resolution : 12.5 kHz Power Supply requirements : 3 ´ AA(R6) dry, alkaline; (negative ground) or optional BP-202 Current drain : Less than 500 mA Operating temperature range : –20°C to +55°C Number of CTCSS frequency : 38 (67.0–250.3 Hz) Dimensions (mm) : 55.5(W)´102.5(H)´26.5(D) (proj. not included) Weight (included 3 cells) : 180 g Ô TRNSMITTER Output power : 500 mW Modulation system : Variable reactance frequency modulation Max. freqequency deviation : ±2.5 kHz Spurious emissions : Less than 0.25 μW Adjacent channel power : More than 60 dB External mic.connector : 3-conductor 2.5(d) mm/2.2 k½ Ô Receiver Receiving system : Double conversion superheterodyne Intermediate frequency : 1st 21.7 MHz 2nd 450 kHz Sensitivity (12 dB SINAD) : Less than 0.25 μV; –12 dBμV Adjcent chnnel selectivity : 55 dB Spurious response : 65 dB Intermoduration : 60 dB Audio output power : 100 mW at 10% distortion (at 4.5 V DC) with an 8 ½ load External SP connector : 2-conductor 3.5 (d) mm (1⁄8")/8 ½

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manuel de réparation
Type manuel:
manuel de réparation
Pages:
27
Taille:
946.05 Kbytes (968757 Bytes)
Langue:
english
Révision:
Manuel-ID:
S-136007II-CD
Date:
Qualité:
Électronique de documents, numérisation sans, bien lisible.
Date de transfert:
19 juillet 2015
MD5:
c9954d5e10f2e1238e0f9abe264ea1a1
Téléchargements:
298

Information

This service manual describes the latest service information for the IC-446S PMR446 FM Transceiver at the time of publication. SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS SECTION 3 DISASEMBLY INSTRUCTION SECTION 4 CIRCUIT DESCRIPTION 4-1 Receiver CIRCUITS ... . ... .4-1 4-2 TRANSMITER CIRCUITS ... . ... . . .4-2 4-3 PLL CIRCUITS ... . ... . ... .4-2 4-4 Power Supply CIRCUITS ... . ... .4-3 4-5 PORT ALLOCATIONS ... . ... . . . .4-3 SECTION 5 ADJUSTMENT PROCEDURES 5-1 PREPARATION ... . ... . ... .5-1 5-2 PLL AND Transmitter ADJUSTMENTS ... . ... .5-2 5-3 Receiver ADJUSTMENT ... . ... . . .5-3 SECTION 6 PARTS LIST SECTION 7 MECHANICAL PARTS AND DISASSEMBLY SECTION 8 SEMI-CONDUCTOR INFORMATION SECTION 9 BOARD LAYOUTS 9-1 MAIN UNIT ... . ... . ... .9-1 9-2 RF UNIT ... . ... . ... .9-3 SECTION 10 BLOCK DIAGRAM SECTION 11 VOLTAGE DIAGRAM 11-1 MAIN UNIT ... . ... . ... .11-1 11-2 RF UNIT ... . ... . ... .11-2

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